Mailgun huge dropped subscriber

[codinghorror (Jeff Atwood)]

Of course when a user creates an account in Discourse, the email is definitely verified working at that time because email = identity in Discourse.

But email accounts can stop working over time, or it could be a migration with existing users who can log in but no longer have control over their old email address, etc.

The process of counting email bounces, if configured, can be important for those reasons:

Where do I find details about bounced emails in Discourse?

I can’t find anywhere in Discourse admin panel where I can find full details of bounced emails – to read the content and find out the bouncing reason. I don’t seem to have those saved in my email account (automatically deleted by Discourse?)

Notify users of bouncing email

I’ve been manually going through bouncing emails for a while and PM-ed the affected users to ask them to check their email settings. Without fail, they did not realise they were using an old email address and updated their profile. It would be useful if Discourse could automatically send these users such a message.